One rai is 1,600 m²; one ngan is 400 m²; one square wah is 4 m². Keep the source measurements alongside conversions.
01
Read all parts
Rai, ngan and square wah are three area quantities. Do not read the separators as decimal points.
02
Convert consistently
Multiply rai by 1,600, ngan by 400 and square wah by 4, then add the results.
03
Worked example
One rai, two ngan and fifty square wah equals 1,600 + 800 + 200 = 2,600 m². This is a unit example, not a property survey.
04
Check boundaries separately
A correct conversion does not verify physical area or boundaries. Reconcile documents and survey with the appropriate professionals.
Land area converter
Turn reading into a useful record
Keep three columns in your working notes: the question, the source of the answer and the action still needed. Give each open issue a responsible person. Ask the relevant professional to explain the limits of their review, and preserve assumptions alongside the conclusions.
Before making a commitment
Use this checklist to prepare a more precise conversation. It does not establish rights, condition, value or suitability of any individual property. Obtain the appropriate independent advice for your transaction and confirm current requirements with the responsible authority.
